Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Reexamination Certificate
2006-12-05
2006-12-05
Heitbrink, Jill L. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
C425S145000, C700S200000
Reexamination Certificate
active
07144531
ABSTRACT:
A method of and an apparatus for measuring and evaluating characteristics of material resin using an injection molding machine. Injections of resin are performed with different resin temperatures TCi and different injection velocities Vj to detect injection pressures Pr at set screw positions. Data of combinations (Pr, V, TC) of an N number of injection pressures, injection velocities and resin temperatures are obtained. An interdependency relation function PVT(t, v(x),x) expressing correlation among the injection pressure, the injection velocity and the resin temperature is obtained as PVT(t, v(x), x)=A(x)e−α(x)Tv(x)β(x)according to a least square method using the obtained data, where β(x) represents a degree of dependency on injection velocity influencing the injection pressure and “log A(x)−α(x)T” represents a degree of dependency on resin temperature influencing the injection pressure.
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Japanese Examiner Grounds for Prior Art Rejection for Corresponding Japanese Application 2001-209448 and English Translation of Same.
Kamiguchi Masao
Kubota Kazuo
Uchiyama Tatsuhiro
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